dts: arm: ambiq: add ITM node for Apollo series

This commit adds the ITM node for Ambiq Apollo3 and Apollo4
series devicetree.

Signed-off-by: Aaron Ye <[email protected]>

Author: aaronyegx

dts/arm/ambiq/ambiq_apollo3_blue.dtsi

@@ -24,6 +24,14 @@
 			compatible = "arm,cortex-m4f";
 			reg = <0>;
 			cpu-power-states = <&idle &suspend_to_ram>;
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			itm: itm@e0000000 {
+				compatible = "arm,armv7m-itm";
+				reg = <0xe0000000 0x1000>;
+				swo-ref-frequency = <DT_FREQ_M(6)>;
+			};
 		};
 
 		power-states {

dts/arm/ambiq/ambiq_apollo3p_blue.dtsi

@@ -24,6 +24,14 @@
 			compatible = "arm,cortex-m4f";
 			reg = <0>;
 			cpu-power-states = <&idle &suspend_to_ram>;
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			itm: itm@e0000000 {
+				compatible = "arm,armv7m-itm";
+				reg = <0xe0000000 0x1000>;
+				swo-ref-frequency = <DT_FREQ_M(6)>;
+			};
 		};
 
 		power-states {

dts/arm/ambiq/ambiq_apollo4p.dtsi

@@ -24,6 +24,14 @@
 			compatible = "arm,cortex-m4f";
 			reg = <0>;
 			cpu-power-states = <&idle &suspend_to_ram>;
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			itm: itm@e0000000 {
+				compatible = "arm,armv7m-itm";
+				reg = <0xe0000000 0x1000>;
+				swo-ref-frequency = <DT_FREQ_M(48)>;
+			};
 		};
 		power-states {
 			idle: idle {

dts/arm/ambiq/ambiq_apollo4p_blue.dtsi

@@ -32,6 +32,14 @@
 		cpu0: cpu@0 {
 			compatible = "arm,cortex-m4f";
 			reg = <0>;
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			itm: itm@e0000000 {
+				compatible = "arm,armv7m-itm";
+				reg = <0xe0000000 0x1000>;
+				swo-ref-frequency = <DT_FREQ_M(48)>;
+			};
 		};
 	};